Since he's not signed to UFC/ or Pride . I'm not sure if his 3 fight Bodog contract is exclusive, but since all the other recognizable fighter's they have signed seem to be able to fight other places it seems plausible ( and he just fought Newton in the IFL). This would be the best case scenario's for all parties IMO
1. Lidland- IMO the #1 middlweight in the world. I don't know anyone who doesn't rank him top 5 at least. He could bury a legend, and make himself a buttload of money( If Gary Shaws Vera offer is beleivable) . It would probably drive up his price in the future. It also looks like a good fight stylistictly for him. If Frank couldn't stop renzo from taking him down, he would be hopeless against Lindland.
2. Shamrock- He would finally be fighting a ranked fighter, and someone all respect. If he pulls it off, everyone's off his back and he can go back to making his grandiose claims of superiority . He will have turned around a lot of public opinion after his dissapointing/disrespecting Renzo fight. A lot of people love a winner no matter what he does. It would prove his constant smack talking aren't just delusions of granduer from an athlete past his prime clamoring for attention . He could ask for even more outrageous sums of cash for his services.
3. The fans- the consensus top 2 independent ( not in Pride/UFC) middleweight's in the world finally fighting somebody everyone wants to see. I'll go so far as to say Horn is in the lower top 10 of middleweights, but I think more people would want to see this fight than theirs.
4. Me- because I think Lindland would pummel him till his jaw had to be sown shut, and I wouldn't have to hear about him ( or especially from him) for a long while