NOT bringing Alice Eve back in the next film will leave us all scratching our heads as to why they introduced her in this movie. Would we be left to assume that something meaningful had happened off screen and then have David appear mysteriously in some future outing. Actually, I hope they DON'T introduce David. Not even fans liked him.
I liked David.
As for Alice, I hope she returns, as I like her character and want to see how things develop for her.