When'd you last play Rift and are you mainly into PvE or PvP? Not sure I'll actually reply again (don't check here very often) but your interests will help people give you better suggestions
For Rift it's self, if you're into raiding River of Souls was the last raid instance to be introduced (a 20 man dungeon) along with Gilded Prophecy (10 man) while of course Greenscale's Blight (20 man) is also in the game, very soon Hammerknell (new, extremely large 20 man dungeon) will be released
For PvP in Rift, the next patch (1.4) brings prestige rank 7 and 8, extra gear sets, synergy crystals (essentially set bonuses) for both pvp & pve sets for individual souls, open PvP rifts (they have been very succesful on the PTS and sound a lot of fun) as well as increasing the rewards of killing people in the world as opposed to warfronts - Also, last patch they introduced world pvp daily quests and they've brought a lot of life to world pvp, server dependant I suppose - If you do start again, I'd recommend transfering to Bloodiron, great server on all accounts, just expect a ~25minute queue around 7pm on weekends.
Goodnight!