If the Toonami staff is smart (and I have faith they are), they will cut Naruto after Episode 135. We don't need to see Filler Hell again.
As for the next show, I've charted out when currently running series will likely end. This is if there's no interruptions or other plans. Like the two-month Bleach repeats.
Samurai 7: February 9th
Sym-Bionic Titan: February 16th
ThunderCats: March 30th
Tenchi Muyo GXP: May 4th
Eureka Seven: July 27th
It's quite possible that the Cartoon Network originals will get re-ran. Especially if they're trying to bring back ThunderCats.
Bleach is still likely to end in 2014.
So we'll be stuck with this schedule for a few months.
Damn, Bad Luck Brian is that long?