The Disney/Fox merger has done wonders for X-brand recognition, a new X-Men movie is coming in the near future (two if you count Deadpool 2), and there's a successful LA series on the tube.
Recognition equals value, value equals investment, so I gotta say, I can see Hasbro dedicating the capital to make a new Sentinel tool, especially as the MU version we're all talking about is saddled with an electronics package. Add in a repack figure like OML and the price for manufacture looks better and better.
Who knows, we MAY just get a new Sentinel this year.
3 movies Deadpool 2 (5/2018), Xmen Dark Phoenix (11/2018) and New Mutants (2/2019) more if you count Gambit and Xforce but I doubt Gambit will ever get made. 2 tv shows The Gifted and Legion but all these projects were in the works long before the news about the merger broke.