They said this would be a sequel to Sonic 3/K, which it obviously is not. It is just using the name to get hype.
Direct quote from Ken Balough of Sega:
While the game is a brand-new adventure, it will definitely pick up after Sonic & Knuckles. However, what you are looking at is the beginning of a new story arc.
Intro from the website:
But this humiliating defeat only serves to further Eggman's rage, and he has determined once and for all to rid himself of Sonic. Eggman revisits - and improves - the very best of his creations to defeat our spiked hero. And so a new Adventure begins...
It obviously is a direct sequel. Oh, and the title is Sonic 4.
They then implied excessively that this would be in the Genesis style, it is not.
They hinted that it would have a retro feel, but never implicitly said "it will have 16-bit sprites and will look exactly like a Genesis game". You (and many others) read it the way you wanted to read it and are now hurt that you were wrong. Meanwhile many other fans read Sega's hints differently, with what we now have as the true finished product in mind.
They also said they would be making it for the 'retro fans', but now it is clearly presented and stated to be for 'old and new fans'.
Despite the inclusion of new fans, the game is STILL for retro fans. Even you yourself just admitted it.
Next they said the were going to split off the new Sonic from the old Sonic instead of trying to please everyone, which is now apparently not true.
Show the quote from Sega.
So overall they are liars. Just look at the boost pads.
boost pads do make or break a game. You're overacting. I liked you more when you make smart ass one sentence comments.