The 21-year-old has taken a little time to settle since his £5million move from Liverpool, but he is starting to show consistent form rather than just glimpses of his talent.
Wieghorst said: "I don't think the English manager has made up his mind yet but Jonjo obviously is a young man and if he keeps playing like this who knows?
"We would certainly be very happy if he keeps performing like that. What he did against Newcastle was great.
"It is maybe a bit too early to say about the World Cup but I think he's got a very bright future.
"He's got so many qualities as a footballer. He's technically gifted, he sees the game well, he sees the pass, he has a strike on him and I think playing as the advanced man in a three-man midfield suits him very well because it's easier for him to get closer to goal, make his deep runs and he has more security behind him.
"I know he plays on the edge at times, but I think you need that, he certainly does as long as you know where to draw the line."
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