The better question would be ... why?
As
@TheVileOne has already mentioned, the 4th film gave them the happy ending, there's no need for a 5th film which would be done for the pure sake of it, rather than because something was left open or they needed to wrap something up.
If I were to watch a new LW film I'd want to watch Gibson and Glover - they're the guys who've made these films as enjoyable as they've been, but realistically, they'd be a means of imposing the film on their children who'd be shoved to the forefront. Gibson might just about have some good action scenes in him, but Glover? He'd end up needing a hip replacement.
I vote no. Let the trilogy be remembered well. Let the 4th film be ... remembered; I enjoyed it but I am aware it wasn't as favourable as the first three. We don't need a 5th, not with this franchise.