I predict FFXIII-2 will be a major bomb for Square-Enix and will show that the brand is on its way down. They will get the punishment they deserve and hopefully make major losses.

Japanese pre-orders are already pathetic and seeing how overtracked games are in NA pre-orders I wouldn't trust them

My prediction combined PS3 and xbox 360 versions sales

Week 1 Japan,Pre-orders point to 400K opening. 600K Lifetime.

Week 1 NA, I'm saying 300K opening, 650K lifetime

Week 1 EU, I'm saying 350K opening, 700K lifetime.

Overall 1.95 Million combined for both versions combined. We may even see The LAst Story outsell it in the West if marketed correctly.

Come on !!
Even the 360 version of XIII tripled its FW numbers in NA and doubled them in EU .. let alone the PS3 version

I think your Prediction is terrible tbh :/

3.8M life time
2.8M on PS3 and 1M on 360,

2 - 2.5 Mil on the PS3

1 Mil on the 360

Not happening. Pre-orders not showing that. It will lose 1.3 Million from Japan for PS3 compared to XIII. It will lose 2 Million from both Eu and NA combined compared to XIII. Leaving the PS3 version at 1.5 Million and xbox 360 will do 500K. 
2 Million WW, won't take long to prove this.

3.5 mil on PS3
1.2 mil on 360

Wanna make a bet?

This must be a joke or something.

How is it a joke? XIII-2 is trending at rougly 1/3rd of FFXIII pre-order pace in Japan, a region where it was received better than in the West.

If we take a third of FFXIII sales we get 2 Million.

No I'm not childish enough to make bets on internet forums.