If anyone pays attention to the title sequences of these films, they always appear in the final film. The first two films weren't anything too special, just the title folding and transforming into place. The next two films however were more plot-centred. DOTM had the title appear from within Sentinel Prime's eye. AOE had the title appear in an Alien/Prometheus-style manner, which fits in with the Prometheus angle (aliens creating Earth, industrialists taking interest in tech, etc). This title sequence seems to be the interior of a habitat (with a sword/triangle symbol). That is very intriguing and it looks to be some sort of important location.
To me it symbolizes the reactivation of Cybertron's core, cause the light appears to be travelling in an in-out manner.
When it goes from the circle eye type thing with sparks, to the triangle shaped interior looking bit...have you seen that it flashes purple/pink before changing back to its normal colours signifying something went wrong in the startup of whatever is going on there.
No,it's not..much less in this continuity.The Allspark is usually 2 things in 1:the afterlife of all Cybertronians and the means of creating new life(so yeah it helps Primus or him in the "Core form" to do it)
Even so I don't believe it is.If this trailer hints at the Core I think it will resemble the one from WFC but who knows..it would be interesting if it was the Allspark though..it would be neat.
Actually I dunno how many of you have noticed this, but the title seems to be glowing in blue-ish light. The one from the posters is darker. This new one kinda simbolizes the resparkling in a sort of the core of Cybertron.