Spoiler DBS manga spoilers (general thread)

People complain about the high school arc for Goten and Trunks,but they need some development,not only as fighters but also as personality of the characters. So its a good move imho. Also,its a chance to introduce some new side characters with their classmates. So i think it will be a good arc. The DBZ filler episodes with Gohan in high school are some of my favorites filler of the series. The best filler of course remains the one of Goku and Pikoro going to driving school!
Is it true that Black Frieza arc would really be the next and the last DBS arc even if Toriyama didn't pass away? And is it true that GT will have a reboot in order to align with DBS?