Glen, who had his first day back training at Chadwell Heath on Tuesday after being recalled early from the third month of his loan spell at Millwall, says: "I was a bit surprised to get called back, but I am very glad to be back, and I just have to wait and see what happens now, don't I?"
Glenn Roeder has said that Glen will come into his thinking over the festive period, and the 18-year-old adds: "Hopefully I will get on the bench; the thought excites me but I am not going to get too excited in case it doesn't happen!
"It will be a little bit of fear, probably, because obviously I want to do the best I can - but then there will be excitement because it is my dream.
"Yes, I would be a bit nervous, but once you get the first touch of the ball you are all right."
Defeat or a draw by Bolton on Saturday would mean the Hammers staying bottom going into Christmas, and Glen adds: "Someone told me the other week that the team that has been bottom by Christmas has never got out of it.
"I didn't know that, but it doesn't matter because I still think we can do it - and it makes Saturday an important game."
Glen's performances at Millwall disproved the rather nonsensical notion that their supporters would not take to him because of his West Ham connections, and he adds: "Their fans are quality; I knew if I did well the fans wouldn't care about that because that's what they are like.
"It has been going well there. I was only left out of the team for one match, the Crystal Palace game, before Saturday.
"He said he wanted to put out a really physical side, and he wanted to give Matt Lawrence a game, but I did come on as sub anyway."
Glen missed the Lions' trip to Leicester on Saturday because he did not train with Millwall on Friday, and if he makes his Hammers debut at the weekend it won't be the first time he has played in front of a big crowd at Upton Park - he was involved in England's under-20 game with Switzerland last week in front of a crowd of 11,800.
"I would have enjoyed it more if we had been winning; it wasn't a great game," he admits of the 2-0 defeat.
It was his involvement in that game on Thursday that effectively ruled him out of preparations for the Leicester game leading to his absence there rather than it being an issue of form.
But Mark McGhee says he is grateful to West Ham for allowing Glen to go there - and help them to get 13 points out of a possible 24 in the games he played.