Give the community a say in upcoming events. mabey once a week in game or on the forum the developers should give us multiple choices and the community vote on which events they want, this could also apply for new characters.
New characters are completed at least a month or so before they’re released at the very least. They also tend to be tied to something in the story, so it’s difficult to change things up even if the player decided they wanted a new Wolverine instead of say, Sentry. As you can see with the next Weekly Tournament too, Tournaments are often tied into releases of content. So while it’s possible we could do something with a user decided “throwaway” Tourney like we had with Doctor’s Orders, many of the Tournaments are planned in tandem with the ongoing story.
To put it shortly, it’s always possible. Just unlikely.
So, Sentry next? 
Nope. Not Sentry next.
I don’t think we have had a 2* in a while. Even though I am somewhat in the 3* character range, I always like to use the “lesser” characters because they bring things to the table that most 3*'s don’t. Heck, I still even use maxed 1*'s 
How many stars was devil dino again?
He was 1*.
Well, in all honesty, I don’t want to see another new character until some old ones are fixed! cough X-Force Wolverine cough
I hear you on that, but they’re going to be adding in new characters regardless.
I’d love to see them add a few characters of varying levels all at once, primarily through the existing tokens. How awesome would it be to use a standard or heroic token and get a character you didn’t even know was around yet?
Ah ha! We’re slowly narrowing down the list. Only about 5000 to go…