That would track with how the "modern" Marvel Animation era has only ever had 3 ongoing cartoons going on, if not always airing alongside each other .Even if they do try to make a shared universe with all the cartoons, I doubt they would try more than 2-3 shows at a time. My guesses would be Avengers, Spider-Man and something new. Maybe X-Men or something, but this is all just speculation at this point.
Now that you mention it and I look at wonderfly's post...wow, that actually seems true! I guess we should get ready for 2020 .There's also the theory how every decade (well, since the 80s anyway) should have two different Spider-Man series...
I'm kind of over the idea of Spider-Man and team-ups, but if they could do a Spider-Man team-up show on the level of Brave and the Bold (and not Ultimate Spider-Man), I would be totally down for it .I don’t really care about a shared universe between series. I would like a Spider-Man series done like Batman: Brave and the Bold though. Or maybe have it done with the Avengers.