Your cat likes me more
In brightest day / In blackest night / No evil shall escape my sight / Let those who worship evil's might / Beware my power--Green Lantern's light!
Start with the TS Advance base game and go on from there. And yes, they do integrate with varying degrees of success. I simply retired my old TS sets and am now sticking with Advance.
I did basically the same thing. I keep the old Thunderstone sets configured to play Epic Thunderstone, and now with the Advance ones I'm keeping them separate.