The Ultimates are listed as an active team so I don’t see why their story would end now, especially with their being only a single Avegers title going forward. There’s too much star power there to be ignored, even without T’Challa & Carol Danvers, so I don’t see them going away just yet.
On a side; Blue Marvel, Anti-Man, and MAC were recently added to Marvel’s flagship mobile game, Future Fight, along with Ewing’s first Ultimates run as a series of story missions. Along with them being featured prominently in Marvel’s previous two crossover events, I’m not sure why people are so pessimistic about their future. They seem to have a place in the MU going forward.
Edit: This isn’t a feat I see mentioned often, but in CW 2 - 5 we have Adam smacking up Luke Cage, and shrugging off a blast from Nova before keeping pace with him as he exits orbit:
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