I'm not going to suggest collusion, but there are some incredible similarities between Round2's and Revell's releases over the last 18 months or so:
1) AMT Chevy LWB van, Revell '77 Chevy SWB van
2) Revell '57 Ford Custom, AMT '57 Ford Fairlaine and '56 Crown Victoria
3) Revell '62 Corvette, AMT '62 Corvette
4) Revell '40 Willy Street Rod, AMT '40 Willys pickup
5) Revell '69 Camaro ZL-1, AMT '69 Camaro and new Camaro ZL-1
They're in cahoots, I tell ya! 
That Dodge Demon is really going to be a hot seller, too. I wonder if the tooling for it is still intact?
I don't think it's collusion. Or even cahoots.
In my opinion it's probably just a matter of two very savvy companies marketing to the same pool of customers and reading the same tea leaves. My position is that they also probably watch each other for signs or tips as to what products are thought to be hot and trendy. If one already has a tooled kit that will fit, great. If not, then they've got to bring one along fast.
My thoughts are that it's not unlike McDonald's, Burger King, Wendy's, Carl's, Jack-in-the-Box, Hardee's, etc. If a geographic location tests out as a hot spot for a fast food burger joint to one company, it's probably also on the radar screens of all or most of the others. That is, of course, if they're all doing their due diligence.
And it might be as you suggested ... if Brand X is bringing out a '57 Ferd and Brand Y already has a '57 Ferd in its inventory, why not pop out some of those Brand Y Ferds and get in on the bandwagon?
There. I've expressed my thoughts, opinions, and position. Everything but my ideas, and I'm keeping them to meself!
