Forum:DLC effects on ME3

Does anyone know for sure what effects the DLC from ME and ME2 would have on ME3? Specifically if you have the DLC, but skipped the content on a playthrough.

I guess it wouldn't be so bad for most of the content except for The Arrival. You pretty much get shoehorned into that outcome for starting ME3, but what if you never played or downloaded it? Would it have major repercussions?

Asking out of curiousity and since I never got to pick up that DLC yet. Should I hold off from playing ME3 or just go with it?