Do you think Namco Bandai should release the HD collection for PS4 due to the original games came out on PS2, or do you think they should release it for Wii U and drive sales up through the need to get another fix of Xeno after the release of Xenoblade Chronicles for 3DS and Xenoblade Chronicles X for Wii U?

I personally think their best bet is to ride the hype of the Xenos on Nintendo consoles, probably to the surprise of absolutely no one. 

WHY NOT BOTH?

Either is fine. Since it's just an upscale it wouldn't make the game any different depending for which console it was made for.

Why not all three? :p

why not also on smartphones and Ipads ?

Why not on Amstrad and the Famicom Disk System? :)

Is their any chance of this even happening? If it does you know it will skip wii u but I don't see it happening anyway.

Both, but if that's not possible then Wii U is my answer. Wii U is getting a new Xeno game so it's the logical choice.

Edit: Making it for the Wii U would also let Monolith Soft work on the remake/remaster.

It's gonna be for the Dreamcast 2 releasing 2016. 

I also feel Monolith Soft should be involved in some way. It IS their franchise regardless of who owns the IP. 

There is a chance, there is talks from Katsuhiro Harada as we speak to see if it there is any demand for the remake.

http://www.twitlonger.com/show/ng78i3

As for the Wii U, it also states that he would love to get the original creators (Monolith Soft) to make the game. 

http://www.dualshockers.com/2014/06/24/katsuhiro-harada-talks-about-xenosaga-and-ace-combat-remake-collections/

"Xeno! We have the rights and we could outsource it, so it’s not like it’s stuck, but if there was a remake I’d want the original staff to work on it."

So it's pretty obvious they'd at least like Monolith to work on it, so a Wii U version isn't only possible, it's likely.