I remember Bandai went hog wild with SH Figuarts Star Wars prototypes at cons just as the Hasbro license was expiring. When Hasbro was able to renew, they pulled back from Star Wars almost entirely, putting out the bare minimum releases each year. I always reckoned they had put on a big show initially to see if they could get some of the rights for US distro, but when Hasbro locked it down they were left to strategize around a much smaller market.
Maybe NECA will do the same, but I'm not so sure. Beyond what they've teased but haven't released so far, I'm not sure there are many big hits left in the line, specifically Toon, but across their other manifestations as well to make the license worth fighting for—if it comes to that. But perhaps negotiating with Mattel will be easy, maybe they could even get a better deal, who knows.
I know people really want Tempestra but she might already be on the docket for later this year or early next. I think the playsets/Big Krang might have to wait until tariffs go away, if they ever do.
Other than that - they've already gone above and beyond and released lots of deep cuts. My own personal want is a set of top-to-bottom remakes of the classic four bros. They don't need to come with a ton of accessories, we already have so many fun ones. Just well articulated bodies, scaled for the line, with several full heads and hands and their classic weapons, that's all I want.