Even with the delay and the lack of marketing I think the 360 version will outsell the Xbox one version. Remember there are over 80 million 360s and the Xbox One is probably in the 4-5 million range at most. Then you take into account that the Xbox One is only available in a handful of countries. Even if the attach rate is only 5% on the 360, that would be over 4 million copies, while it would have to be almost 100% for the same number of the Xbox One.
I think that the game getting delayed into April is very telling about the sales of the game on Xbox One. By delaying the 360 version MS does not need to worry about the March NPD numbers showing the 360 as the best selling version. Then when the April NPD numbers come out they will use the excuse that everyone bought the Xbox One version in March as the reason the 360 version is the best selling version in April.
I also find the complete silence about sales numbers of Titanfall and the Xbox One to be very interesting. Sony and MS both love to tell us how great their systems and games are selling. The fact that we have heard nothing from MS for over a month seems to be very strange. Perhaps they are waiting for the March NPD numbers, but if they have sold a million or more copies of the Titanfall or the Xbox One we would have seen a press release by now.