I think Sega announcing their own line of classic games for the Switch this summer means we probably won't have a Virtual Console or equivalent until the fall, at least. And that doesn't... not... make sense, to potentially roll that out alongside the paid online service at the same time.
It's important, though, to not fall into the trap of "well, System X will be on the Switch's Virtual Console because its original predecessor was on the Wii U's Virtual Console." It's more complicated than that - the Switch has to be able to properly emulate that system, the games take up memory, and so on. So don't automatically expect titles from systems like the GameCube or the Saturn or the Dreamcast on the sole basis of what seems like natural progression. If Hydrohs sees this at some point, I believe he can explain it better.