This must mean that the RFU are waiting for Mallinder to finish the season with Saints. Fair enough.
What is of the utmost importance is that Lancaster picks the players that will bring us forward over the next four years. His relationships from the Saxons should be beneficial. He must look at it as a win-win situation. With a temporary manager and a new squad, the pressure will be off - no one will expect England to win the 6N, and he doesn't have to worry about the job anyway. Frankly, I don't care where we come. So building the team will be the priority, and you never know, it may bring about a few surprises.
Best case scenario: England have 5 good six nations matches, where a lot of young talent is on display, we play good rugby but there will obviously be matters of inexperience and silly errors... no matter, it's a good learning curve. New leaders on the field start to emerge. Mallinder takes over to bring England on a Summer Tour.
Worst case scenario: Johnny Wilkinson starts every game at 10, and Hape, Easter etc. play a big part. England win 3 out of 5 games without really learning anything, and the entire tournament is wasted. Young inexperienced squad brought on summer tour and has confidence wrecked by heavy defeats.