Miller vs. Diaz to now be UFC on FOX 3 main event

Eights days ago it was announced that Nate Diaz vs. Jim Miller would meet on the May 5th, UFC on FOX 3 card in East Rutherford, NJ. Most media and fans speculated this event would most likely to determine the next no.1 contender for the UFC lightweight title, which Frankie Edgar is set to defend this month.
At the time it was announced, it was stated this would not be the main event, but would broadcast on FOX. Most likely there were other fights trying to made to serve as the main event, but last night the UFC's official Twitter announced that the bout would now serve as the main event and be a five round affair:

So, @UFConFOX news? Diaz/Miller now the 5 round main event, also on main card heavyweight battle @LavarJohnson vs Pat@hypeordie Barry

Also announced was that heavyweight Lavar Johnson, who just this weekend knocked out Joey Beltrain, would fight Pat Barry, also coming off an impressive knockout win over Christian Morecraft.
It seems that with these two fights, the UFC is making sure their is not a repeat performance of the UFC on FOX 2 event, which had three somewhat uneventful bouts all go to the decision.