The Japanese version of Samurai Shodown Anthology has been released. It does NOT have 5 Special which will be an exclusive to the US version. Once again, as with the Metal Slug Anthology, SNK has botched the ports of the earlier games in the series (1 and 2). Tenka is different from the stand alone PS2 version and has much shortened load times. Here is a brief rundown of the individual ports: http://www.ncsx.com/2008/072108/sspirits_rokuban_ps2.htm.
EDIT: Dude doesn’t appear to know shit about Samurai Shodown. Well, I will leave his “review” up until someone disproves what he says about 1 and 2.