I don't think Slimehinder was totally unnecessary. It looked like he came out of his womb healed and refreshed, which doesn't mean much if he loses his powers because of the eclipse. Or did he lose it if it was artificially placed in him?
I also don't get why after a whole season of playing house mom, Sylar goes back to wanting to kill people. And Elle was the one that egg'd him on, but later in the episode broke down and said they can't have everything. WTF!?
Here is my guesstimate for what happens next week, it's not actually what's going to happen, but it might! So don't read ahead if you want to be spoiled by my half-baked theory.
Claire is taken to the hospital because she is bleeding out on the bed, and her mom freaks out and goes against HRG's word that Claire should stay at home. She is rushed through the hospital and dies in the process, the doctors use the Paddles of Destiny to send a shockwave through her body, thus unleashing the catalyst that jumps from her body outward like a mushroom cloud. HRG takes the shot and splits a tear drop that's falling down his face after crying about his arm. He goes to the floor.
Commercial. Bullshit online series promo about the guy who can slow down time AND move quickly? Uhhhhhhh? Back to the show. We think Sylar has been killed, but due to Claire's shock, all the powers are back and the bullet is pushed from his head and Elle screams, "Yippee!" HRG, thinking he killed Sylar, finds Claire in the hospital to tell her the good ol' news only to realize that she is fully recovered without a scratch.
Sylar is now PISSED because his former partner and bro mate has just betrayed him. Sylar goes on a rampage and destroys everything in sight. He becomes to powerful for anyone, and they must all join together to take down Sylar, who is now 50 feet tall and breathing fire. King Arthur takes a stab at it but loses his head in the process, thus releasing all the powers he stole. Peter Patrelli finds his powers again and flies inside Sylar's giant mouth into his body. Peter releases his exploding self, thus sending pieces of Sylar all over the city. People rejoice. Heroes is cancelled.