Outside of the trailer, limited details of the game have been shared, but Gematsu reports that the game will feature new cards, new characters, and new Digimon, and a closed beta test will be available at some point in the future

Sort Card Type Roaring Moon #109Rare $0.14 Roaring Moon #109Rare $0.17 Roaring Moon #65Rare $0.17 Roaring Moon #11Promo $0.52 Roaring Moon #100Common $0.16 Roaring Moon #51Rare $0.20 Roaring Moon - 2024 (Sakuya O.) #109Rare $1.88 Roaring Moon (Master Ball Pattern) #100Common $6.46 Roaring Moon (Mirror Foil) #100Common $0.79 Roaring Moon (Poke Ball Pattern) #65Rare $0.33 Roaring Moon ex #124Double Rare $1.35 Roaring Moon ex #124Double Rare $0.79 Roaring Moon ex #162Special Illustration Rare $179.63 Roaring Moon ex - 054/066 #54Double Rare $0.34 Roaring Moon ex - 067 #67Promo $2.32 Roaring Moon ex - 067 #67Promo $0.86 Roaring Moon ex - 084/066 #84Super Rare $3.04 Roaring Moon ex - 090/066 #90Special Art Rare $40.81 Roaring Moon ex - 093/066 #93Ultra Rare $7.83 Roaring Moon ex - 101/187 #101Double Rare $0.38 Roaring Moon ex - 218/187 #218Special Art Rare $37.60 Roaring Moon ex - 229/182 #229Ultra Rare $3.57 Roaring Moon ex - 251/182 #251Special Illustration Rare $39.54 Roaring Moon ex - 262/182 #262Hyper Rare $6.74 Roaring Moon ex #162Special Illustration Rare $179.63 Roaring Moon ex - 090/066 #90Special Art Rare $40.81 Roaring Moon ex - 251/182 #251Special Illustration Rare $39.54 Roaring Moon ex - 218/187 #218Special Art Rare $37.60 Roaring Moon ex - 093/066 #93Ultra Rare $7.83 Roaring Moon ex - 262/182 #262Hyper Rare $6.74 Roaring Moon (Master Ball Pattern) #100Common $6.46 Roaring Moon ex - 229/182 #229Ultra Rare $3.57 Roaring Moon ex - 084/066 #84Super Rare $3.04

Second, they do work well for double sleeving
Im talking Commander for sure, and possibly even a bit of Modern and Legacy if things line up nicely
MSRP is used when weighing their values, as secondary market prices are highly volatile, but remain relatively proportionate to their MSRPs when it comes to current pricing tiers
One of my favourite moves is to summon Harpie Channeler and then use its effect to bring out Harpie's Pet Dragon or another Harpie card in Defence mode