I hope they add the last 4 story tiles soon.

Also - did you guys notice, but the Turkey and the Spider boss from previous events have a chance to pop out randomly instead of the usual corrupted Commanders ?
Was doing my daily quest on the second game tile (still tutorial one) and encountered the turkey boss. Later that day I got the spider boss from the last event.
I must say I like the idea of re-using them this way, better than for them to be just a one time thing.