Well, looking at the last update of MBP's, the Best buy inventory showed them being "in-stock" on May 31st, when in reality, they went on sale on May 27th.... a 4 day span.
This time around, Best buy is showing an in-stock date of March 14th, which is a Sunday. Most likely they will not go on sale on a Sunday. However, March 9th is 5 days before the 14th. So if the trend stays true, the new MBP's will come out on March 9th (Tuesday, as usual), leaving a nice 2 to 3 week space between the new MBPs and the iPad.
Thoughts....
See:
https://www.macrumors.com/2010/02/1...book-pros-continues-more-best-buy-skus-found/