Mid-September will bring us a new unlockable character unavailable to Duel Links as of now. Based on the given quote we can assume that the new unlockable duelist will be Yubel whose personality mainly revolves around her love for Jaden as its owner. Another evidence is the leaked Mat and Sleeve of Yubel - The Ultimate Nightmare.
Massive Update - 5D's World available on 25 Sept 2018
A New Development in Yugioh Duel links. This could likely be the addition of 5D's, the third series of YuGiOh into Duel Links like how GX was added late last year. With the addition of 5D's World comes the addition new characters, events, cards, and the Synchro summoning mechanic.
it would be cool if there was a free play area in duel links with regular yugioh playstyle, so that way people can have more free play with the game, seeing as if we ever get anything beyond zexal like pendulum's or link's they might need to increase the monster and spell zones.