Ultraman Trigger's Spin-Off "Marlu-Dex" or "MaruttoNavi" was introduced in today's Takaya's Room #2 along with the Trailer. The Trailer is now on YouTube. The interesting thing is Marluru will not only introduce the Ultraman Trigger elements. But also the past Ultras.
The spin-off can be only viewed in Tsuburaya's streaming platform - TSUBURAYA IMAGINATION. But you don't need a subscription to watch this. You just need to register for the TSUBURAYA IMAGINATION account.
P.S. TSUBURAYA IMAGINATION is region restricted. So you need to use VPN to watch it.