I am genuinely happy that Hasbro announced the new versions of Luke, Han, Obi-Wan and Chewbacca. There's been a pretty vocal group that has been loudly advocating for these characters to be brough up to date. Especially since their best, most recent renditions date back to 2009 (the TVC Yavin ceremony Han Solo is based on the 2009 TLC version). I think people who are loyal to the brand should eventually get what they want. I just think things take a bit longer to materialize than most would like.
As for the general topic of this thread? Where will the focus shift for OT fans who want main characters? I'm of the opinion that it might be a significant update to Luke Skywalker in Bespin fatigues. And that's because the previous versions just haven't really captured Mark Hamill's likeness that well. Beyond that? I could see a push for a TESB Snowspeeder pilot Luke. But in light of the existence of an excellent Snowspeeder Luke from the Legacy Collection, making this iteration of Luke in TVC seems like an exercise in putting something on a TVC card just to get that figure on that cardback.