Nice pickups!
I absolutely adore the design for the first generation Mega Drive packaging. You should take a look at your serial number and check if you ended up with a unit from the late 80's rather than one from the early 90's.
Super League is pretty nice for an early sports game, and while I've never played Super Volley Ball it is essentially a precursor to Power Spikes from the same company, so I'd expect it to be at least interesting. Advanced Daisenryaku probably won't do you much good, but the art sure is beautiful.
Good starting mix on the NEO, too! Try to add Fatal Fury Special to that sometime, one of the best
and least expensive purchases you can make on AES.