Could we mix up current maps and game modes?

I'd love to see something mixed up, even with what we currently have! Is there a reason we haven't seen an ARAM on TT or SR yet? I think it would make for fun new creations on SR, like whether a team decides to skip a jungle role due to champion line-up, and how it could affect the enemy team's line-up.

Combinations of say URF and Nemesis Draft could make things interesting as well! Would it be easier to make these combinations since the two modes already exist?