Super Smash Bros. helmsman Masahiro Sakurai has told Nintendo Power (via Nintendo Everything) that the next instalments are a long way off yet.
I can’t really say anything until things settle down with Kid Icarus… And a lot of it will depend on the team that I end up assembling for Smash Bros. It may take a while, but I think that your patience will be rewarded.
Prepare to have your patience tested, but ultimately rewarded. Hopefully.