Truly the second most-stupid ending i've ever seen (after American Dragon Jake Long):
1. Is Prowl completely offline?
2. Will Megatron escape (they could at least have severed his arms and legs to prevent him from doing that)
3. What about Sari? There was some completely retarded scene when she looks at and touches one of the protoforms, saiyng: "This is where I came from". It certainly doesn't explains how did protoform (from which Sari evolved) ended up in Sumdac's lab?
Verdict: TFA lost itself after "A Bridge Too Close" episode (season 2 finale)! I hope they wouldn't dare to create another season!