My opinion? I want.. no need it now.
But I do want to comment on the title of the game, Fire Emblem "If"
Due to the title and comments on the title (By Intelligent Systems) saying that each choice will have a significant impact on how you play, I believe this game will feature multiple endings. Similar to how the Shin Megami Tensei games have multiple endings due to your choices you make as your progress in the story.
This is where I believe the title comes in is that there will be pros and cons to each decision and everytime you make one, a character will say something along the lines of "If you did this, *so and so wouldn't die*" or something like that.
Not sure obviously, but this is how I believe the game will play story wise and I am very excited for it! I wasn't a HUGE fan of Awakening, the main thing I liked about it was it kept the franchise alive. Otherwise, it definitely wasn't my favorite in the series. (My favorite being Radiant Dawn) and I hope that If surpasses RD. :D