If Steve's return was in a Captain America 4 after Evans had completed an Avenger trilogy and Cap trilogy might be a good way to recast. It'd be 2020 give/take a year or so and I'm sure Evans would be wanting to move on as well.
Steven is back from the dead and comments like "Steve glad you're back, look a bit different, you sure you're okay" type comments. As a wink/nod to the recast. Like Rhodey's "Yeah, it's me, deal with it" from IM2.