I'm hoping HK makes a VP9 Compact - i.e. G19 size rather than G26 size, and using USP Compact magazines. Maybe it won't be better than a Glock 19 but it's nice to have alternatives.
There's M&P Compact too, never held one though.
Any VP9 compact will still be too fat and out of contention to compete with a G19 assuming they keep the same grip angle and fundamental magazine dimensions. The grip angle of the platform doesn't lend itself to capacity either, so you'd end up with a 13 round gun maybe at the most. (ignoring MA bullshit for the sake of discussion). Basically, the VP9 Compact won't get there from here- best case, it will be another small, fat gun like a 2000SK or M&P9c, etc. The laughable thing about these guns is their OAL is shorter than a G19 but most of them are still fatter than it is.
-Mike