I like the idea of a new Deadpool and an overhaul of DDQ and/or DPvsMPQ.
I want them to give Supports a full release, since we’re currently still in a sort of “beta” phase. Add in another wave of supports like the beginning (not the tie-ins we’ve had for new releases or events, but a variety of things, AIM Troops, Cerebro, Jarvis, Shield Backup, the Danger Room, Oscorp Tower, the Baxter Building or Fantasticar, maybe even some Infinity Stone level toys like a Cosmic Cube or Ultimate Nullifier or Power Cosmic?). Add tokens to the game normally. Regular Beginner tokens (one every event, more in placement, more in the DDQ overhaul suggested above, etc), the possibility to earn Advanced/Master tokens. Enough tokens, the Red ISO from dupes will cover the shortage of that resource. Maybe a bonus token (Master level?) as thanks for everyone who helped “beta test” them so far (hell, go ahead and give people a head’s up to use them so the people who have objected to using them thus far don’t miss out either), enough free Red ISO to get one support to level 50, an optional Respec if you’ve tinkered and want to un-level a Support and put that Red ISO somewhere else, the works. Add in a way to acquire Infinity Stones (even if they’re stupid rare in RNG, that’s better than no chance for anyone who is reasonable about knowing they can’t win PVP seasons). Add in some specific supports as well (Fight for Wakanda should give a guaranteed Wakandan support, if the event comes back, for example), the way we fight for placement for specific covers now, apply that to Supports as well, so if you want a specific support, you can work hard in events to try and earn one, and not be wholly stuck hoping RNG is in your favor.
I’d like to see the typical Anniversary stuff, special Anniversary season, boatloads of Anniversary tokens, Dino covers and PVP, Class of PVP, that kind of thing. A new event would be nice. I’d be down for a revived Boss Rush that’s a little more balanced like Sinister Six. I’d be extra excited for something new (Civil War style event, call it Avengers vs X-Men, two boss nodes on each side like Sinister Six, throw in Boss versions of 5* characters so we can fight Cap, IM, Widow, Hawkeye, Thor, Hulk, Gambit, Wolverine, Phoenix, Archangel, etc, maybe add in some boss versions of other characters so we can add Professor X and Magneto to the list? Sinister Six has boss versions of 4* characters, after all).
But I’d really like new regular events for the rotation. I’d even be excited if they announced the old 7-day events were being broken into 4/3 day “Part 1/Part 2” splits, because that’d give us 8 new events out of existing content. I think I would be happy if they found a way to bring back 7-day events, Heroics, the Gauntlet, Boss Rush, Crash of the Mad Titan, the events like Growth Industry we haven’t seen recently (Amadeus Inferno and the Coulson event). Taking retired content and retooling it for re-release sounds more exciting than a single new thing, at the moment, because it would mean more variety for a prolonged period of time.