Konami reveals 3 more monsters, at least with images.

The Event runs from April 5th to April 12th.

Participants get Field Center Cards and Promotion Packs.

Duel Staff with either a Dragunity Deck or a Cyber Dragon Deck. Before Dueling, the staff will give a lecture explaining how to use the Deck with the new cards included.

Decks will be 20 card Half Decks

Source

Source 2