I'd much rather see a similar sort of event started for cRPG. I find the balance and gameplay feel in the mod so much better now than in Native that I generally prefer not to go back. It'd be good practice for Strategus, too.
I kinda expected this reply at some point.
Its very difficult to have formations in cRPG, mainly because everyone is so different! Formation require some degree of homogeneous(Probably spelled wrong) people. I'm not sure cRPG can do that.
But, what we can do is make big organised battles anyway. I feel there's a big difference between a big organised battle and a formation battle. The objective ain't same in the 2 scenarios.
We ARE already organizing big battles in cRPG. Aemalius seems to be working on it, although the process might be slow. If it grinds to a halt, you can feel confident the Fallen Brigade will take over. (And NOT necessarily turn it into clan e-peeing)
Summing up: Its on the way.