There is None. In fact, reverse (-sad that plan was not a 'success') was the 'fact' (as borne out by citation and not 'assumptions'.) After Swayanwar...
"Accompanied by his brothers, Aswatthaman, his uncle (Sakuni), Karna and Kripa the prince set out with a heavy heart for his capital. Then Duhsasana, blushing with shame, addressed his brother softly and said, 'If Arjuna had not disguised himself as a Brahmana, he could never have succeeded in obtaining Draupadi. It was for this disguise, O king, that no one could recognise him as Dhananjaya. Fate, I ween, is ever supreme. Exertion is fruitless; fie on our exertions, O brother! The Pandavas are still alive!' Speaking unto one another thus and blaming Purochana (for his carelessness), they then entered the city of Hastinapura, with cheerless and sorrowful hearts.
"Vaisampayana continued, 'Having heard these words of the monarch, Vidura said, 'O king, let thy understanding remain so without change for a hundred years!' Having said this Vidura returned to his own abode. Then, O monarch, there came unto Dhritarashtra, Duryodhana and the son of Radha, Karna. Addressing the monarch, they said, 'We cannot, O king, speak of any transgression in the presence of Vidura! We have now found thee alone, and will, therefore, say all we like! What is this that thou hast, O monarch, desired to do? Dost thou regard the prosperity of thy foes as if it were thy own, that thou hast been applauding the Pandavas, O foremost of men, in the presence of Vidura? O sinless one, thou actest not, O king, in the way thou shouldst! O father, we should now act every day in such a way as to weaken (the strength of) the Pandavas..."
Regret !?!..if any, it was over the failure of the plot!!🤢
@MedhaS, i may opt the silence, noting discomfiture of personal nature (not you)...i meant analysis of only epic facts. No offence to fellow readers or their beliefs, even while i stick to mine.😒
