While many thought that Brock Lesnar's meeting with UFC President Dana White could be a way of adding fuel to his WWE story of quitting and suing WWE, WWE did not mention Lesnar's appearance at the UFC 146 event. The latest word is that there is no involvement from WWE's end of Lesnar attending UFC events this past weekend.
It is believed that Lesnar made the decision on his own to attend UFC to both add intrigue to his WWE story and to make a "power play" with the two companies. When Lesnar met with Dana White, he did bring up the idea of working with the UFC again.
In the past, Dana White has had no interest in working with Lesnar or anyone in professional wrestling as long as they are signed to a wrestling contract.