XDP reshoots are underway, Jen was seen in Mystique makeup, so that means XDP is definitely being released in theaters. they wouldn't spend all the reshoot money if the house of mouse was going to shelve the unfinished film, in favor of their own version of the Dark Phoenix storyline.
i read somewhere that the mouse cannot make decisions on current FOX assets until after they have complete the sale of tv, media, and SKY radio/sports stations agreed to under the terms of the FCC regulator's antitrust deal, which may take another 6-9 months to complete, possibly even a year. that's good, meaning FOX can release XDP as the closing chapter in the X-Men First Class Quadrilogy.