For all we know, there may be edited scenes from the 1st BP that will be re-tooled into having CB in BP2 ....the rest will just have someone in the BP suit all covered up.
Then get lines of dialogue spoken by CB from BP1 and other movies of studios under Disney(if there are any) can also be retooled as speech in scenes where BP is fully covered in BP suit.
We still get CB in BP2 acting and speaking without recasting and/or cgi face implanting on other actors.
Disney has the cash and resources to make this possible.
Me just trying to give some positive scenario here guys.