Atlus has recently published gameplay movies for Persona 5 to their official YouTube account, showing off Persona summons in battle and other important aspects of gameplay, including fishing. These videos arrive ahead of Persona 5’s release in Japan next month (!), while the West will receive the game early next year.
The Persona summoning video features seven known party members (Morgana, Anne, Protagonist, Ryuji, Haru, Makoto, Yusuke,) while the fishing video briefly sketches out setting up the minigame and one (successful) shot at fishing.
Keep in mind that the videos are in Japanese! Both of the videos are also quite short.
Persona Summoning:
『ペルソナ5』ショートムービー【ペルソナ召喚編】
Fishing:
『ペルソナ5』ショートムービー【市ヶ谷で釣り編】