No sé, pero tengo en la mente que estarán los 5, aunque nunca se sabe... si el año pasado aparecieron los 7 de Kanjani, ¿por qué no puede aparecer Arashi al completo? aunque también podría ser uno (o dos) el protagonista y los demás ir saliendo a medida que transcurre la historia con pequeños cameos, algo a lo que ya estamos demasiado acostumbradas xD.

Por ahora lo único que podemos hacer es esperar para ver qué pasa, aunque sí que es cierto que me estoy mordiendo las uñas por saber quién será !!
Aunque lo que sí espero que sea un dorama, los documentales-doramas como que no me emocionan tanto :(

When I have time later, I will try and write a comment with my uninteresting opinion.

i want the one that will be starring for 24 hours drama is NINO..
because i'm miss him so much...
hahahahahaha

just my ridicolous thought..
XD

I voted for any one of them, but my top most likely pick is either Ohno or Sho.

Nino and Jun had done the previous two SPs, so they might not do it again.
Aiba... Well... I think he is not really a strong actor...yet. Not for something with a much more serious and heavy theme.

Ohno and Sho have proved able to act in heavy emotional piece. And they can pull in the viewer ratings - especially if they're paired up with kids, I think. The SP most likely would be in a family setting. Wife and kids.
A problem with Sho might be scheduling (close to Olympics). I don't know when Ohno, Aiba and Nino would complete their drama series and movie filming, so that might affect their chances too. ^^;; Jun seems the most free, but seeing summer usually means Arashi tour, he might be busy with organizing that.

As for cameos only... Well, unless they aren't that many lead actor/actress who can pull good drama ratings these days outside of Arashi and SMAP...? So they would certainly want any of them as leads... Or at least a Johnny's. Who? I don't know.

I am hoping for the five of them to act together again. They could totally adapt the characters from My Girl or Aozora Pedal PVs and follow how the brothers/friends are coping following March 11. ^^

Theme song... I don't think Arashi sang for Nino and Jun previous SPs, right? Don't remember. ^^;; I wonder how many singles they're going to release this year... At this rate, they seem to be making up for the lack of single release last year. XD

Voted, but I can't elaborate a comment right now and, honestly, I am really in doubt about this subject...