They have released Romana, Uchtul and Pilsken so 20 more cards to go ( i guess). They could be saving the best for the last. And such a big card like Glibon Darsa Sark might not be suitable to be released through just new blood. An optimal release for such a card would need to have a huge event.
Well. You got Stellas and Virginia, but 6 damage isn't high.
You got Phonos, but his damage is high only a fraction of the time [plus Lilou does the same job for 3 stars cheaper.]
You got Eris, but courage isn't good and you would prefer it to be + damage anyway.
You got Sol Hona, but he's hindered by Soa.
You got Reine Cr, but she's a downgrade of Sol Hona.
You got SkrumxxT, but bis damage is murdered by Soa.
You got Guru Cr who fits to nice, high damaging solid 5 star perfectly. Do we need a second one?