Successful spinoffs, in contrast, usually take a path opposed to that of funneling charisma-characters into ensembles, where they have collective stature. Usually a given icon is introduced in a Subordinate relationship to a Prime icon or icons, and then the Sub icon gets a separate serial, thus accruing some degree of stature, depending on how the serial fares in terms of either quantitative or qualitative escalation. --INDIVIDUAL AND COLLECTIVE STATURE PT. 2.
InPHASED AND INTERFUSED PT. 2, I described how a particular stature-bearing icon, Robin the Boy Wonder, completed a phrase shift away from being an icon within a superordinate ensemble to being (in the identity of Nightwing) a stand-alone superordinate icon. Here I want to deal with a phase shift related to a subordinate icon graduating to a qualified superordinate status-- qualified, because the icon remains stature-dependent upon the icon from which she was derived.
For most of her existence, Lois Lane was a part of Superman's subordinate ensemble. Starting in SUPERMAN #28 (1944), the girl reporter got a backup series in that title for about a year. Now, for the length of time that said series existed, Lois Lane was the superordinate icon, while Clark Kent/Superman, whenever he appeared, became a subordinate icon. But for Superman that was a very qualified status, since Lois's popularity was contingent upon that of Superman.
Now, in the essay referenced in the quote above, I went on to describe how the "spin-off" Batgirl functioned as a subordinate icon within the Batman serials up until the point that she graduated to her own serial. However, BECAUSE Batgirl appeared to be fast-tracked to getting her own series within about five years of her debut, she was also a proto-crossover. Lois by contrast was a pure subordinate icon, and neither her 1944 serial nor the Silver Age one that lasted for about thirteen years-- SUPERMAN'S GIRLFRIEND LOIS LANE-- really did anything to lesson her standing as what I've labeled a "Charisma Dominant Sub." My same verdict holds even given the existence of a couple of television shows in which Lois and Superman were arguably equal Prime types, those being LOIS AND CLARK and SUPERMAN AND LOIS.
Now, all the serials in which Lois is a stature-dependent Prime and Superman is her Sub do not count as crossovers, the way all of Batgirl's appearances in BATMAN serials do hold that status, simply because Batgirl became a "Stature Dominant Prime." By the same token, Superman does not have any crossover-status with Lois in her own serials, in the way that he does when he teams with Batman in the WORLD'S FINEST feature. The "phase shift" associated with a support-icon being spun off in a separate feature, but a feature that does NOT alter the overall status of the feature's star, is distinct from the one in which such an alteration of status does take place. For this, the example of Robin-turned-Nightwing is instructive, because once Nightwing is independent of Batman he's no longer automatically aligned with the Bat-universe. One example I cited was that because Batman meets Ra's Al Ghul after discontinuing his partnership with Dick Grayson, Ra's Al Ghul does not belong to the Grayson-verse.
Now, in the Silver Age LOIS LANE feature, unlike the short-lived Golden Age one, the Prime star sometimes met other icons who belonged to Superman's Sub-cosmos, such as Lex Luthor. Everything in Superman's cosmos is also in the dependent cosmos of the girl reporter, so Luthor and other Super-villains have no crossover value, as they would if they interacted with Batman under the WOR LD'S FINEST umbrella.
Lana Lang presents a slight anomaly, because, by the rules I set up in Part 2 of this series, Lana belongs to the SUPERBOY cosmos, not to that of SUPERMAN, because the personas are different even though they belong to the same person at different ages. Further, at the time that Lana made adult appearances in LOIS LANE, she also continued to appear as her juvenile self in the SUPERBOY title. Lana Lang remains a "Charisma Dominant Sub" in the SUPERBOY feature, but though she's also a Sub in LOIS LANE, she's also not subsumed by her juvenile persona any more than Superboy is subsumed by Superman. My solution to this anomaly is to say that when Adult Lana starts appearing in LOIS LANE (in 1957's SHOWCASE #9, which led to the ongoing LOIS series), Superboy's Girlfriend generates a one-time-only crossover-vibe, as she undergoes a phase shift from one type of Sub-persona to another. This is loosely paralleled by the rule I set up for the third season of the 1966 BATMAN series, in which Batgirl joined the Bat-team as a permanent member (in contrast to her comic-book history). In that case, only Batgirl's first episode in the Bat-series generated a crossover-vibe.