Nintendo and Konami decided that they wanted to release a full remake of the original MGS, but Konami didn't want to have to dedicate very many of their own resources to do it this time, considering that they've got their hands tied with a lot of other projects. So, Nintendo asked SK to take the job, they did, and it was mostly SK staff that worked on the remake.

Now that I've explained it to you, don't you think you probably could have figured that out on your own?