They proved with AC 2 that they can make great improvements to a good but flawed original product. Although I ddid not like watch dogs mainly due to it's absolutely terrible driving , I am certain the next ame would be much better.
The improvement in the sequel would determine if it is a successful franchise or not. AC 2 led to a slew of commercially and critically successful sequels and made the AC hugely popular. I mean the last two games shipped 12 and 11 million each that's just superb for a open world platformer.
Let's see if they can emulate the success again.
If not I hope they a new PoP game.