Lately, we have seen a number of clans getting evolved G3 units with a on-stride bonus. For instance, OTT had Battle Sister Florentine, Link Joker had CBD, Dark Irregulars had Amon Agares, Narukami had Eradicator Sigma, and Shadow Paladins had Claret Sword. If this trend continues, we shall see each clan getting their own alternate stride bearers or boss units, and a whole slew of support including named G4 stride, personal stride fodder, etc. If we examine all the above examples, the choice of G3 is typically based on an existing archetype, where the original G3 boss unit already has some decent named support across G1 to G3. Except for Claret Sword, most are typically Limit Break archtypes.
I play Murakumo so if I'm going to predict an alternate stride bearer for the clan, it will be Hyakki. It's not that Murakumo has great choices when it comes to archetypes: Dueling Dragons, Shirayuki and Magatsu; I'd still go with Hyakki getting a new G3 form with a stride bonus. That will also certainly mean a new Hyakki stride, and just perhaps a Hyakki stride fodder. This is something to look out for in GBT-13, where Murakumo will get some support.
That is not to say Bushiroad won't surprise us all by building up Shirayuki or an entire new archetype around a G3, like the way they did it with Dueling Dragons. However, Murakumo is 2nd/3rd from bottom of the clan list in GBT-13, and as ingredients are typically listed in a descending order based on their amount, it means Murakumo is only getting some paltry support in GBT-13. I'd much prefer they build up an archetype properly than haphazardly slap a few support units together for Shirayuki.
What other clan's archetype do you think is a good candidate to get evolved G3 units? My guesses:
Neo-Nectar: Musketeer
Megacolony: Machining
Link Joker CBD