But Marvel’s bigwigs know that crossovers and team-ups are the kind of things that drive fans wild (while also driving up ratings), so I guess it’s more an issue of creating a story or situation that makes the effort worth the trouble.
(The CW ended up importing Supergirl to its own schedule after the Flash crossover, so weird things happen.)
With all the deals and handshakes that have to be made in order for characters to cross platforms, it’s understandable why it doesn’t happen all the time.
That answer Jeph Loeb gave at NYCC (via TVGuide) isn’t necessarily an impetus to create a Halloween costume that’s half-Quake and half-Punisher, but it’s the absence of a denial that truly is exciting for fans of all these shows.