So, throw your ideas in here. =p Remember Harmonix's main "rule" with dreamscapes: they can't be literal interpretations of the lyrics.
Fixing a Hole: No idea.
She's Leaving Home: I guess they don't show any of them playing any instruments (because they don't play any at all in this song). But that's as far as I can get.
Being for The Benefit of Mr. Kite: Although the circus could be considered "too literal", I'd love to see something like it.
When I'm Sixty-Four: I'm 100% sure that "When I'm Sixty-Four" will appear in the background when Paul sings that part.
Lovely Rita: Good question. Another one that I have no idea.
Within You Without You: I guess they'll recycle most of the WYWY/TNK dreamscape.
Sgt Pepper Reprise: Sequel to the SPLHCB/WLHFMF dreamscape. Shows them playing on the same venue, except at night (maybe landing somewhere before the songs starts?).
A Day In The Life: My idea would be the Beatles walking in a deserted London. Or walking in a crowded London while not being noticed by any passerby. But I don't think that's possible with DLC.