The previous fight proved that Tristan would not be able to oppose the Arcadian king's commands; not with his current level of strength, at least. After healing both his wounds and his pride, he was ready to meet the king.
In his current condition, the smart thing to do was to comply and wait for the right moment to strike back. He must act patiently, he just hoped he didn't need to kiss the king's ass while he was at it.
Approaching the hall, he was still a bit annoyed that the queen didn't end up doing much to aid him. He somehow believed that the queen had his best interests at heart, but he couldn't figure out why she didn't back him up. There had to be something else, aside from his strength.
After all, why would the Vanyar queen let another kingdom do as they pleased in her own territory? As he sauntered along, he began to ponder about her motivations. He still believed that the key to his freedom lay in the hands of the queen.