Well as I said, I feel like the Marvel Horse is dead and only waiting for the beatings to stop anyway.
But the furor over Battletech canceling a beloved long-term author does make me think that would be a ripe acquisition. Battletech has enough epic history to get a new replacement cinematic universe out of and comes pre-loaded with game, book, cartoon, and film enthusiasts allowing it to be turned into a mega-franchise with Disney power behind it.
Topps, I think, wouldn't necessarily be hard to part from their share of BT's IP. From what I've read it's been a bit of an albatross to them, as they tried to export their tried-and-true random booster pack strategy and the fans of BT reacted pretty poorly. Since then Topps has just licensed it out without working on it themselves and... well... there's a reason about 90% of BT fanfic is set in the succession wars/clan invasion period and the Jihad/Dark Age/Republic eras are quite unpopular. So it's doable to pry those rights away.
Microsoft holding the electronic rights is a harder target. They're a bigger company and more acquisitive by nature. However, I believe the negotiations are doable for somebody with Disney in their corner. The division of rights weakens them a bit, because they don't have any non-electronics rights they can't sell any merch for their games which, while not huge for them, still makes it less profitable than their other franchises and with a chunk of change I believe those rights could be pried loose.
Finally, Weisman has some odd clause in the rights allowing him to make games but only specifically in the 3025 era* and Ironwind Minis and Ral Partha have the rights to make gaming minis only. We can work around all three pretty easily as they're small potatoes and could either be bought out or be given a reasonable licensing fee.
*At least this is what I've been told, it sounds odd to me.
This leads to a few guilty pleasures. Firstly I get to ruin Harmony Gold's everything. They were already losing in court cases against small-potato gaming companies working on pocket-lint budgets. Against Disney-Grade lawfare? Yeah, I'll squish them if they even blink wrong. Ideally, I instead extract the Robotech license from Harmony Gold and take it for Disney. At this point, I approach Japanese rights holders and work out a deal to allow Super Robot Wars and Macross to come back to the west. I won't even ask for any money for it, just make a public spectacle of how Disney wants everybody to be happy and enjoy all media, even if it's not our own. The goodwill from this should be tremendous.
If I can't get Robotech, well, it's no big matter, that would just be gravy. I'd have to sit on the license for years anyway because running two different giant robot franchises at once would be competing with myself. If I do get it, I'd alternate it with BT productions in order to stagger them apart, and possibly aim them at different audiences by making Robotech for the younger generation and BT for the older. Of course, I'd simply remake all the Veritechs and Destroids to ensure there's no copyright issues going forward and everything is original at that point.
So what to do with Battletech? The Star Wars model actually seems pretty good to be, but stretch it out some instead of pushing the movies so close together. Major events are trilogies, a Fall of the Star League Trilogy, Fourth Succession War Trilogy, and Clan Invasion Trilogy would net nine blockbuster movies. Stagger them at two years apiece and a couple of years between each trilogy and there's a solid plan for two decades. Side Story movies about minor characters can be set in between though probably not every year, I want to keep the franchise warm but not overheated and not cool. Basically, avoid both franchise fatigue and the franchise being forgotten.
In the meantime we can do a few TV shows following mercenary companies, bounty hunters, and gunslinger types. Have Mech, will Travel similar to The Mandalorian. We'll have more lighthearted adventures as a cartoon for the kids to get their feet wet in the setting so that in a decade when they grow up, they'll be positioned as fans for the next trilogy. It's also prime to set some non-violent drama stuff, f'rex a family of spacers trying to keep their ancient JumpShip intact as a space-themed domcom would work well. Of course, since BT already has a stable of authors, we'll do plenty of book tie-ins, games, and merch. So much merch. Mad Cat backpacks, larger-scale fully-articulated action figures for every last 'mech ever made at the various scales Transformers work on, Urbanmech Soda coozies, we're going to rake it all in.