I don't think there will be any big surprises happening in the final minutes of the transfer window.
Heidenheim against Dortmund is quite worth looking forward to because in terms of quality these two teams are not too different, especially since Heidenheim is a strong team when playing at home, of course Dortmund will have quite a difficult time in this match in my opinion.
Heidenheim has indeed drawn when the match took place at Dortmund's home ground, so it is very possible that Heidenheim will be stronger when playing the match at home against Dortmund. However, I don't think that Dortmund will experience too much difficulty when facing Heidenheim, because recently Dortmund has also started to get better and has also returned to the top four of the Bundesliga after being able to win at home when they hosted Bochum.
Dortmund seems to be in great shape lately, and even though Heidenheim is playing on their home turf, Dortmund is expected to perform strongly and secure a victory. The match might be a bit challenging for Dortmund, considering Heidenheim's efforts, but it's unlikely that any unexpected outcomes will alter the final result. Dortmund is the favored team to triumph in this game as they are currently performing better than Heidenheim.
However, in football, surprises can occasionally occur, as we've seen in the past. Despite this, Dortmund remains the team with the highest probability of winning today's match. So, while there might be some uncertainties, the odds are in favor of Dortmund emerging victorious at the end of the game.