I'm not sure I understand some of that but as we've seen for quite some time, they have spaced out the champion updates, champion releases and splash updates.
Warwick's update was released January 25th followed by Galio on March 21st with the Karma Splash Update on April 12th. We then go into the mid season on May 3rd with Maokai, Sej and Zac updates (along with Mao and Sej splashes). New comers approach us in the April 19th Patch (Rakan and Xayah).
Then from the other info we have so far, there is at least one more new champion to be released before Urgot (sometime mid June or early July). Then we have Urgot himself (July to August), and this is then where I say we see the MF splashes (September), and then Eve (October) and then the Pre-season Class update and Pre-season changes (November).
So MF is still a wild card here as I said August before but then looking back at what we have, it could be September.