It's doesn't matter about 'replacing Mascherano' because Mascherano isn't needed in Hodgson's 4-1-1-3-1 formation (He played against Rabonicki). Lucas played very well in the Defensive Midfielder role and Gerrard was good in the Box to Box Midfielder role. I don't see why we have to change anything from that, at least not yet.
You must be dreaming. Arjen Robben is playing for the Champions League Runner Ups and we do not have the money to tempt him, like Man City. However, if the takeover is done and Roy Hodgson get's a lot of money to spend, then I don't see why not. But I doubt it right now. Anyway, Robben said Liverpool's front three is fearsome, not that he wants to join it.
Source:
http://www.goal.com/en/news/9/engla...h-star-arjen-robben-liverpools-front-three-of