Again, it really depends on what you mean by ‘weird’. Do you still mean “stuff that is not directly traceable to the historical Buddha” by it?
There’s this conceit in many Mahāyāna texts that said Mahāyāna sutras are more superior to and have more spiritual benefit than earlier teachings; ergo, those who follow the “Great Vehicle” gain more benefit than those who follow non-Mahāyāna approaches to Dharma. A lot of explanations are made to account for why these texts are late: the
Lotus Sutra, for example, claims to be a discourse made by the Buddha toward the end of his life, only it was hidden for centuries in the realm of the
nāgas because humanity was not ready for it yet. It was supposed to have reappeared again in the human realm (rather coincidentally!) at the time of the Fourth Buddhist Council during the 1st century, which is within the accepted time range for the historical composition of the text (100 BC-AD 100).
BTW there is here in East Asia Pure Land Buddhism, based on the doctrine that faith in the buddha Amitābha and the repetition of his name (
nianfo,
nembutsu) allows one to obtain birth in Amitābha’s western pure land, where one can achieve enlightenment without being distracted by the sufferings of this world. A Japanese Pure Land sect,
Jodo Shinshu, even goes on to say that rebirth in the Pure Land is assured the moment one puts faith in Amitabha;
nembutsu is simply the expression of one’s gratitude. The founder of Jodo Shinshu,
Shinran (1173-1263), believed in the paradoxical maxim 悪人正機 (
akunin shōki), in other words evildoers and sinners are exactly the ones in need of salvation by Amitabha, and to give a public example of this idea he violated taboos by taking a wife, which explains why Japanese Buddhist clergy today (even those who are not affiliated with Jodo Shinshu) could marry.
For Shinran, attaining enlightenment solely through one’s own efforts (自力
jiriki ‘self-power’) is highly difficult, if not impossible. The higher path one must take - and the authentic form of Buddhism for him - is to have faith in the power of Amitabha’s compassion made manifest in his vows (the ‘other-power’ or
tariki, 他力). This would of course pit the ideas of Jodo Shinshu against Chan/Zen Buddhism, which emphasizes the attainment of enlightenment and the personal expression of direct insight in the Buddhist teachings and thus and favors direct understanding through
zazen (meditation) and interaction with an accomplished teacher.
Another contemporary of Shinran,
Nichiren (1222-1282), preached a more radical form of Buddhism. Japanese schools of Buddhism at the time looked at their highly turbulent times and wondered whether humanity had reached the age of
Mappō or the “Latter Day” of the Dharma. (Mahayana has this concept of dividing the time after the Buddha’s death
into three periods: the last of these,
mofa (Mandarin) or
mappō (Japanese), is the age when the Dharma declines and is forgotten - think something like the Hindu
Kaliyuga). Nichiren shared this belief with other Buddhists of his day: however, what set him apart from all the others is his belief that the original teachings of Buddhism have become corrupted - which is to blame for all the disasters and strife. Denouncing all the other schools of Buddhism current in his day for teaching what he saw as inferior and corrupted doctrines, he instead upheld the Lotus Sutra as the highest and ultimate teaching of Buddhism, containing the Buddha’s authentic teachings, and preached that devotion and practice based on this sutra (embodied in the Nichiren mantra
Nam(u) Myōhō-renge-kyō and its visual manifestation, the
Gohonzon) was the only means of salvation for this age.