Thanks for resuming the events of those series for me, i was to lazy to keep reading after Logan quit the whole thing after the Prime issue. Stilln Infinity Wacth is decent so far, so at least something good is coming out of it.Basically the classic Wolverine never appeared outside of "Hunt For Wolverine" and "Return of Wolverine", the one we saw during Legacy/Where is Wolverine was a future version of Wolverine who used the Phoenix force and the time bat to come back in time. Using his powers he changed his appearance to look like his younger self and rewrote the future of the Marvel Universe and most notably the events of Infinity Wars.
Originally Loki was supposed to gather the Infinity stones, becoming Requiem, killing Thanos and several innocents but at the end of his quest he was left broken by a revelation. The Phoenix Wolverine who is a really old Wolverine who lived for eons as an host of the Phoenix Force met this future version of Loki who begged him to go back in time in order to stop him from gathering the stones. (Wolverine Infinity Watch)
The Phoenix Wolverine agreed, he extinguished his flames and came back in time. Back in the past, he changed his appearance to look like his younger self, stole a beer truck and thanks to his knowledge from the future he killed a frost giant and got the space stone. (Legacy)
Once he got this space stone, he tried to meet with people who are going to play a big role during the incoming War of the Realms. (where is wolverine)
To make sure that Loki wouldn't get the space stone, he gave it to Black Widow (Infinity Countdown), he then saved Loki from the celestials using the Phoenix force (Avengers 700) and then went back to the future where he met King Thor (Issues 1,5 and 6 of the current volume of the Thor series by Aaron). After his fight with King Thor, he received a telepathic message the past and learned that despite his intervention Gamora became Requiem instead of Loki and the Infinity Wars still happened. Using the Time Bat, he went back to the past and gave Loki a power stone in order to defeat Gamora. After defeating Gamora, Loki just like his future self discovered something that broke him. In the future both Thor and the Phoenix Wolverine knew that Loki has a vital part to play in order to save the universe, so he went back in time one last time and recruit Loki to save the universe.(Infinity Wars)
All those events happened while the dead body of the present Wolverine was used by Persephone as one of her undead soldiers during Hunt For Wolverine.