Ixalan brings with it the first rotation in what seems like forever
Bond Lands The bond land cycle (including Training Center) is handy for any multiplayer format since they will usually come in untapped
Wizards could also explore other products like the Modern equivalent of Challenger Decks , although personally I find it unlikely that this type of product would succeed because the amount of valuable cards Wizards would find it wise to put into a Modern preconstructed deck product would likely be a lot lower than what some players would like, especially considering unironic requests for moving Snapcaster Mage to uncommon or selling box sets of 20 fetch lands for $50
Yusri, Fortune's Flame and Squee's Revenge provide even more card-draw options for those with a few coins in their pockets, and never forget the potency of Rhystic Study in any deck that even splashes blue
Lucario is classified as a 3-Diamonds card in the Space-Time Smackdown set
The most important thing moving forward wont be playing the best or most broken deck, but instead finding the one that plays to your strengths and learning the ins and outs of its match-ups