NO! HELL NO! Unless you have Unicron in this one, you have absolutely NO justifiable reason to make this! I love explosions, I love giant robots. But I also love continuity and plot! I LOVED Gundam Wing's plot-heaviness. I loved Transformers Armada's genuine attempt to give a decent plot and human element to a series made to sell toys. And yes, I even bought the toys, shame on me.
Movies have a habit of ruining my favorite series, unless made by the original creators. FF: the Spirits Within bombed because Square had little to do with it, FF7: Advent Children(esp. Complete) was great because Square took care in it matching the series. Same with Resident Evil Degeneration, an honest-to-god genuine part of the series unlike those other three who shall not be named. I pray to God that the Metroid and Halo movies never come out, or else Retro/Nintendo Studio B and Bungie make them personally. Similarly, if whoever made Armada makes a Transformers movie, I'd be all for it.