Some might have wondered if Theo James would be back for this movie and according to one source, he had to be back because of the work that he put into the last film. Since the film centers around his character, there would be no option to leave him out. He is supposed to star opposite two female characters and even though casting continues, one of them could be Lara Pulver.
Theo James has been getting very famous with is Divergent series and there is hope that some of that will extend over to Underworld 5 when it is released. Box office numbers have been talked about a bit with Underworld having only brought in $450 million in global sales for all four movies.
Critics would assume this movie would have to do great to keep up with the sales in theaters around the world, but the chance that this is the final movie in the series are pretty good as well.