Yes and no.
Yes because they're definitely 100% working on a new main series AC game
No because no one actually knows what console it's going to be on, but there have been a lot of hints it will be the Wii U, but nothing is certain
I disagree. I haven't seen any clues Jakey -_-
It's nothing more than perpetuated rumours.
- - - Post Merge - - -
I presume it will be delayed, due to the long period of time it takes to change all of the Japanese events to other countries' ones. It takes a long time for the changing, so we couldn't expect it until late 2016-early 2017. Soo, yep.
Also, how can something be delayed when there's been no official date set for a game that doesn't even exist xD