So there's lots of points that you can argue to this, but the fact C5 seem to only care about CBB means no, it probably won't be extended.
But I was thinking, the ratings are OK just now, yet facing huge competition from football and being beaten from love island. However, when both them finish ratings
could surge, and if it's near the end of the series and ratings suddenly get better, maybe they will extend it to prolong the that? They'd be able to easily, there are more than enough housemates to extend it by months