The fact that a European giant has Javi Martinez in mind is not new nor is it surprising, so has Real Madrid & FC Barcelona.
It is said that Bayern has an offer ready of 7M€/year as part of a 5-6 year contract. Big bucks indeed for the versatile midfielder who can slot into the middle of defence if needed. The youngster is recognized as one of the big promises of European Football.
The difficulty for Bayern is Atletic Club which considers Martinez a key element to their team & may react with a new & bigger contract offer. This & as said, the other two big Spanish Football Clubs also interested in the player.