#4 Promote Shawn Michaels
In addition to being one of the greatest wrestlers of all time, Shawn Michaels is also one of Triple H's closest friends. If Triple H assumes complete control of the WWE, he would be foolish to not use the wealth of experience Michaels has, to help him run the company. As The Game moves up the corporate ladder, his need to delegate duties will increase as well, and who better than The Heartbreak Kid to assume some of the responsibility?
Michaels' technical knowledge and storytelling capabilities are unparalleled and Triple H would be wise to use his friend to develop the new recruits down in NXT. Michaels can take on whatever level of responsibility he desires because his presence in any capacity will be massively beneficial to the development of the NXT brand.
You can see Triple H and HBK interact while talking about DX here: