Hey guys, i am returning to the game after a 2 year break and i saw the details about the new core set. What is happening to the old core cards? Are they just rotated out or banned or what? Still trying to piece together what i have missed.

Revised Core Set is comprised of Original Core cards plus some Genesis and Spin Cycle cards.

Anything from that era not in the new Revised Core has rotated out:

https://images-cdn.fantasyflightgames.com/filer_public/00/9c/009c2fa5-a0c2-402a-acf3-6e051613e4ca/adn49_cardlist.pdf

Awesome. Thanks a bunch! I also saw that there are now restricted and banned cards. Has the meta shown more variety instead of tons of NBN and Anarch?

It's freaking awesome.

Now, granted that HB:CI is pretty much the best corp faction right now, there are many significant builds, BUT,

... even at that, you know that the next iteration is going to be a meaningful change, not just a speedbump.