Or only at the beginning and end? That's one of the biggest things I wanted to know that the QL unfortunately ignored. Well, that, and what the "Extras" menu contains.

just at the beginning and end. There's also an ingame cutscene before the boss fight, where every character faces their "nemesis" from the roster , so to speak.

Aw, that's unfortunate. I really would have liked a bigger focus on the crossover story, since seeing all these characters interacting together was a major appeal for me. Kinda wish there was a more in-depth story mode, like Konquest from Mortal Kombat: Deception, or the obvious comparison of Subspace Emissary.

Oh no, it's nowhere near subspace emissary / konquest I'm afraid. Wasted opportunity on that front a bit. And the still image prologue / epilogue's are a bit disappointing. The animated scenes before rival / nemesis fights are generally funny though.

Extras section contains character bios and EULA btw, nothing fancy.