The West Ham co-owner has been full of praise for the £4.5 million summer signing.
Indeed the midfielder, in Sullivan's own words, was brought to Upton Park for a fee of £4.5 million this summer and impressed the co-owner with his performance against Manchester City.
And he feels he has seen enough from the 23-year-old to predict a bright future for him.
Sullivan told the Mirror: "Tony [Henry] brought in Obiang. He cost £4.5m. I think he is going to turn out to be a good player. He did really well in the win against Manchester City."
Sullivan is right to pick out West Ham's policy of signing players for good deals as there has been plenty of that this summer, as opposed to plenty of over-paying in the past.
West Ham will no doubt prefer to be facing the Eagles away from home - judging by their results both at and away from Upton Park so far this season. Pardew will want to get one over his old club, though, and Palace certainly aren't pushovers after their equally strong start to the Premier League campaign.