The dynamic commander mod is in a tourney of its own (two technically), but they are played on SMC maps, for a "two birds with one stone" effect, both maps and mod need tested, and both are created by us. If you mean something different to that, there are no plans to have that done as it is a "period of exclusivity" for multiple reasons as stated above, but I will reiterate them here: Testing (plenty of issues with lack of full mod tools), patching and balancing (new commanders = new abilities that we will have to work on including and getting to function properly), and the fact that we wanted this to be run in tangent with SMC from the get go.
Ah OK with you. Well I hope once you've tested thoroughly and "breathed life into SMC", I hope custom commander mod go out in public domain, would be very cool to have fun with them when they're ready!