The official Twitter account for Dragon Ball Super has announced that the first look at the upcoming TV series will come 14 June 2015 alongside the regularly-scheduled Episode 157 of Dragon Ball Kai:
明後日6/14(日)放送の「ドラゴンボール改」にて「ドラゴンボール超」の予告が初オンエア！！「改」のクライマックスと共に要チェックです！そして来週月曜日には公式HPがパワーアップ。気になるメインビジュアルも公開予定です！(S)
The first on-air trailer for “Dragon Ball Super” will be broadcast with “Dragon Ball Kai” the day after tomorrow, June 14th (Sunday)!! It will also be worth checking out the climax of “Kai”! And then, the official home page will receive a power up this coming Monday. The anxiously awaited main visual will also be released! (S)
Viewers can — finally! — look forward to the debut trailer and key artwork alongside the Dragon Ball Kai episode, with additional updates to the series’ official website promised for the following Monday.
Dragon Ball Super, which begins airing 05 July 2015 on Fuji TV, is the first all-new TV series for the franchise in 18 years. The story and characters will be developed by original manga author Akira Toriyama, will star veteran voice actress Masako Nozawa, and will be directed by Kimitoshi Chioka. The series will, “…follow the aftermath of Goku’s fierce battle with Majin Boo, as he attempts to maintain earth’s fragile peace.” A manga adaptation from “Toyotarō” will run each month in V-Jump starting in June.