Just like I said in my previous post here, I bet it will have some integration with LN
It would be a good time to do this since exchanges are really adopting LN, like Binance that did it recently, and we already have information that Coinbase will also work on it

Although we already have fast networks for depositing on DuelBits, LN is almost instant and the most used currency
LN brings interesting possibilities for more cautious people, such as the total ease of depositing, placing bets or trades (in case of exchanges) and at the end of the day withdrawing the money and repeating the process as many times as you want, since the cost of these operations is extremely low

I also think 3.0 is not about new games, but design + features, I'm anxious to see