That's tough. On the one hand, the 3DS is on a downward slope. It's life is coming to an end and we're in it's final year(s). On the other, even the first half is looking better than all of 2014 for the 3DS where its only big games were a port and a remake.
Even without info, there's no doubt in my mind that 2015 will at least match 2014 in software significance. We'll get at least two big games, and one of them will definitely be Pokemon. I personally think that a 2D Metroid is long overdue, so my bets are on that, and there is still much to confirm.
Even still, I don't think the 3DS will outsell it's 2013 year. So I think it will be slightly up YOY or at least even, but definitely won't approach 2013's year.
EDIT: But I couldn't care less, because the 3DS's software line up is finally awesome again!
