Foreshadowing?

Tanaka in ch120:

The twin who died 4 years ago… 

but who was brought back to “life”…

and certainly “went astray”.

Of course if the twin is some kind of Bizarre Doll then he probably doesn’t have a soul anymore, but in any case that scene of ch120 is personally the main reason in my opinion as to why Tanaka won’t side with the twin: if he’s as angry/crazy as the attack on Soma and Agni seemed to prove, then he’s nothing like the young master Tanaka used to care after and thus Tanaka has no reason to choose his side over our!Ciel’s (which doesn’t mean he won’t be very sad).

One could even go further and say that, in the crack theory by @thedarkestcrow that Tanaka knew in advance that the twin was coming back**, these words of ch120 could be a direct allusion to the current situation.
I used to think that this scene was about Tanaka blaming himself for the deaths of Vincent and Rachel (and maybe Claudia), but maybe it is in relation to the twin after all and Tanaka is already sad at the thought of the upcoming conflict between two children who used to love each other very much. 

[**: I couldn’t find a more detailed post and I can’t recall if @thedarkestcrow detailed this crack theory more or if it was just something we discussed in private (please don’t hesitate to send a different link :)), so basically:

• there is a chance that UT is not the one who brought back the twin, but he’s definitely involved as we saw with ch108/120, so it’s possible that he tried to slow/sabotage the experiment with the 4 Lords if he’s not the one behind it. [x]

• also considering Frances’ rather odd behavior in the arc, definitely stopping Ed from being involved with Ciel’s investigation but apparently not trying to do anything to get Lizzie back (as far as we know), we wondered if she didn’t actually know (via UT?) why Lizzie ran away and who exactly was sheltered by the blue sect (the twin). 

• finally about Tanaka, considering the theory that he and Frances might have been working together to keep an eye on our!Ciel ever since he came back 4 years ago, if she knew about the twin, then she could have told him and maybe that could explain why Tanaka was nowhere to be seen in ch129 (if that’s not Yana’s mistake of course).

These are pure speculations, so don’t take it too seriously, but even if Tanaka wasn’t referring to the twin in ch120, I still think the panel fits when it comes to foreshadowing the current situation with the twins finally facing each other.]