I agree with Dave T, 9mm in a revolver is at its best in snubs and competitive shooting events with large frames and long, ported barrels.
There are several other things I'd rather see, if strictly revovler, I'd rather see the LSR, a GP100 sized LCR. Too much focus with revolvers is with lightweight snubs, but once you go above J frames, then it seems interest in lighter weight drops. Scadium is what Smith uses to lighten the weight of their larger revolvers, but they cost a lot. Ruger could bring an LSR out that weighs as much as a Scandium framed gun and price it at $500 easy. Imagine a GP100 size revolver that weighs as much as an SP101 and costs less too.
Would also rather see .327 3" LCRx, but some .32 H&R Mag LCR's built on the Aluminum .38 frame too. The Al frames the .38 is built on seem to be cheaper as most .38 LCR's I see are well under $400 new, if given the choice of around $375 for a .32 Mag LCR vs $500 for a .327 LCR, I'll take the .32 Mag in a heartbeat.
.45 Colt Redhawks in barrels longer than 4 inches would be nice. Help up the velocity with the "Ruger only" loads.