I will try to break down the whole thing cause there are many interesting things in this trailer.
EDIT 1: Character description and abilities updated on the 07th expansion website. Link below
Willard H Wright
EDIT 2: Confirmed abilities --> Will's ability is SP cancel, Lambda's is ULTRA PER. Both confirmed on the previously linked trailer.
Speculation can start or not, but we will know what Will's does in 4 days or so. In Lambda's case, it would be next month.